Title :
A wide tuning range gated varactor
Author :
Wong, Wallace Ming Yip ; Hui, Ping Shing ; Chen, Zhiheng ; Shen, Keqiang ; Lau, Jack ; Chan, Philip C.H. ; Ko, Ping-Keung
Author_Institution :
Dept. of Electr. & Electron. Eng., Hong Kong Univ. of Sci. & Technol., Hong Kong
fDate :
5/1/2000 12:00:00 AM
Abstract :
A wide tuning range gated varactor for radio frequency (RF) applications is described in this paper. The gated varactor is a three-terminal device. The third terminal helps achieve an improved tuning range. The measured tuning range of the varactor exceeds /spl plusmn/50%. The new device can be implemented with a standard CMOS process without any post-processing. A 2 GHz prototype voltage-controlled oscillator (VCO) is implemented using the new varactor in a 0.35-/spl mu/m CMOS process. The VCO achieved a sensitivity of 220 MHz/V.
Keywords :
CMOS integrated circuits; UHF diodes; UHF integrated circuits; UHF oscillators; circuit tuning; varactors; voltage-controlled oscillators; 0.35 micron; 2 GHz; RF applications; VCO implementation; standard CMOS process; three-terminal device; voltage-controlled oscillator; wide tuning range gated varactor; CMOS process; Circuit optimization; Prototypes; Radio frequency; Ring oscillators; Transceivers; Tuning; Varactors; Voltage-controlled oscillators; Wireless sensor networks;
Journal_Title :
Solid-State Circuits, IEEE Journal of
